since
翻译
自从, 既然, 由于, 此后
例句
I have lived here since 2010.
我从2010年起就住在这里。
Since you're busy, I'll go alone.
既然你忙，那我就一个人去。
He left last year and I haven't seen him since.
他去年离开了，此后我再也没见过他。
语法模式
since ((时间点)) 自从 I have been waiting since 10 a.m.
since ((从句)) 既然；由于 Since it is raining, let's stay inside.
since ((从句)) 自从……以来 She has been busy since she started her new job.
近义词
同义词: from, after (时间); because, as (原因)
词源
源自古英语 'siþþan'，意为“在那之后”。
记忆技巧
记住 'since' 有两个主要用途：表示从过去某个时间点开始（自从），以及表示原因（既然/由于）。